I'm posting here cause I think my problem is related to cgminer.Indeed, I bought an old antminer U3 for bitcoin mining (just as a hobby). I had followed all the procedures with the CP210x driver and Zadig. I had disable all the firewall and antivirus/antimalware software.Windows can detect the device with the right driver.

But cg miner keep displaying "USB init, open device failed, err -12".

I'm joining to this post some screenshots.

I really think the problem is coming from cgminer and the device.

I'm using windows 10, 64bit. I tried with cgminer 4.10, 4.9 and 4.8.The command line for the batch is simple :

I'm trying to get an old Butterfly jalapeno up & running on a Pi. I have 4.9.0 compiled with --enable-bflsc. When I launch CGminer, it even claims to see the device. But I can't figure out how to tell it what the device ID is to enable it. I've tried all the combinations of Bus, Device & ID that it says it sees, but can't get any of them to enable. Can anybody point out what I'm missing?

I had similar problems with getting a Gekkoscience 2Pac running. I needed to use the cgminer version from the Gekkoscience 2Pac thread. I compiled it by using the exact instructions from the first post of the thread.Maybe you have the same issue and need to use a specific version of cgminer. Isn´t there a support thread for your miner, too?

I had similar problems with getting a Gekkoscience 2Pac running. I needed to use the cgminer version from the Gekkoscience 2Pac thread.

The Jalapeno is directly supported by CGMiner. I just fired up mine a couple weeks ago for giggles with CGMiner 4.9.2 and it worked fine.

So I would try it on a Linux or Windoze machine for a test to make sure the hardware still works then move to the RPi.

Mine is grounded with a broken power brick but when I was trying to get my raspberry pi working, it worked like a charm.Even so, I plugged her yesterday to my laptop with a 12v@2A brick and fired cgminer for a couple seconds and had no problem at all, also.